If you want to automatically send emails from SendGrid to Infusionsoft contacts, use Zapier to send an email when you tag a contact. Once you tag a contact in Infusionsoft, Zapier will tell SendGrid to send out an email to that contact.

Send emails from SendGrid to tagged Infusionsoft Contacts

If you want to automatically send emails from SendGrid to Infusionsoft contacts, use Zapier to send an email when you tag a contact. Once you tag a contact in Infusionsoft, Zapier will tell SendGrid to send out an email to that contact.